Clinker grinder and discharger for furnaces.



OBOSCO C. WOOLSON, 0F NEW YORK, N. Y.

GLINIAIER GBINDEB AND DISCHARGER FOR. FURNACES..

Specication of Letters Patent.

Patented Feb. 10, 1914.

Application tiled February 8, 1913. Seria No. 747,004.

Be it known that. I, Unesco (l. \\'oor.soN, a citizen of the United States, residing in New York city, in the countyof New 1ct-ii and State of New York, have invented certain new and nsetul Improvements in Clinker Grinders .unl"l)isehargers for Furnaces, of which the Ifollowing is a specification'.

This invention relates to improvements applicable to that well-known classl of furnaces from which the ashes and clinker are discharged downwardly through an extendod longitudinal outlet space by the action of a revoluble clinker-grinding shaft or niember by which the discharge is ell'ccted and re;,fuiaied.

principal objert of the present improve-I nieuts is to furnir-.h a clinker-grilnler or diseharger in which a plurality of grinder members are so organized in connection with retaining and actuating devices that the grinder may luy rxadily disasseinbled and reasisemliled, :i-id that in case of overheating or beine' blocked by hot. slag and partial fusion, tthese being accidents always imminent.) the apparatusI can be rapidly and eco nemically dismantled and then be quickly put into operation again.

further object. ne to furnish a. clinker- `grinder ot." that claas in'whieh a tubular frilulei-shal't shall be composed of removable short-length members arranged for being driven one i'rom another, and for being cooled while in vuse by internal air currents.

ln the drawing aeeomp-.ulying and forni` ing a part of this specitieation, Figure. l is a .side vieux-in which sonic parts are partially ln'ohen avv'zthvf---ot a elinker-diseharger organized and arranged in accordancev with my present invention. Fig. 2 is a view from the lett` hand in lfig. 1 of the actuating lef ver and ratchet devices t'or rotating the elinker grinder. Fig. 3 is an end view seen from the left hand in Fig. 1 of one of the grinder members: and Fig. 4 is an enlarged side view .of a portion of this grinder member which. in Sie'. 1, extends between two successive bearings near the forward end et the furnacev chamber. Fie. 5 a crocs sec tional view in line X-X, Fig. l, for illustrating the usual and preferred arrangement'. ot the clinker grinder relatively to the inclined grate bars of the furnace. Fig.

is a side view, and Fig. 7 anend view, of.

one of the collar-forniV grinder members of the Style shown in the rearward portion of the grinders-hatt which i's at the right hand in Fig. 1. Fig. 8 is a sectional view of the rear carrier in about. the line Zs-Z, oiV Fig. l, for showing the manner in which the uut for the tension rod may be arranged in that carrier. Fig. 9 ,is a fragmentary view illus` trating the preferred manner of connecting the rearward carrier and the forward carrie-r by means of a winged bar which is also a tension member; in this view both ot' thev carriers are shown partially broken away and the tension nut at the left hand is shown in section. Fig. 1t)` is a front. view of the preferred form of tension nut, and is drawn in alinement with this part shown in Fig; t). Fig. 11 a` sectional view similar to the central portion of Fig. 5 for illustrating a,

modified form ot' the combined guide-bar and doweling member which in Fig. .l is shown in the form of a cylindriv'ral tube. Fig. 12 is a side view of the forward vend of the cylindrical form ol guide-bar, and Fig. 13 is a view ot' the rearward end of the .saine form ot bar when this bar is arranged to also .serve as the tensioning member. Fig. 14 illustrates a n'ioditication of the tubular gui/.le-bar constructed for operating in connection with the. rear carrier when thinI is constructml as shown in Figs. l, 8 and S).

Similar characters designate like parts in all the figures.

In my improved elinkengrinder. a principalfeature is the composite tubular grinder shaft provided with breaker prongs` or teeth and equipped for being revolved in bearings located at the bottom of the furnace; it is adapted for being employed in furnaces ot' various speeitic instructions and arrangements. ln the drawings, however, l have shown only such fragmentary portions of one of the more usual forms of such furnaces, as seemed desirable for properly illustrating-th'e arrangement and operation of theV grinder itself. In this selected form and arrangement, as shown in Fig.- 5, the Vrinder shaft-designated in a general way )y S.- may be located bet weeirthe two side walls. 2.

2, of .the bottom frame l", which serves for y carrying the lower ends of the oppositelyinclined grate-bars. as (rand f/l, in a welslknown manner. For supporting the grinder .S in' the frame F, this may be provided with some suitable bearings. properly located, as for instance (see Fig. 1) the forward bearings b and b,the rear bearing b4,

a suiteoie number of intermediate benin b3. [7": diie :irrmigement of Yframe i oemig simiier io some which 'A y art, will 'be .e more particular deebow/e; for 'iiis purpose of furnace piee: may be errang' 1 over the, carrier, so :indicated by the fragmentary portion of a severi-pleite shown at 23. it rearward end of 'ihe grinder, the 'rem' Carrier C is Shown eupporied ive bearings sind 55, over which is located iie eoverpiate 27 for prf teoting the rear hearing and ear-:rior from ashes and oinders- The said ferrie# plate is usuaiiy arranged in connection .Ei the. rearward brick W211i, as 28, or the is mice chamber, whie she space .rearward of ihe member Q7 iii ile eoovenieny illori in Wieo eamerete, :it 2.9, iney 'weii known mnner. in practice die Said lower bearings (ne from 51 to '14, inclusive) may properiy be arranged 'from one to' two feet. apart, Rie-pending, of comme, on die of the grinder and zhe long `i of the furnace. It note-d ilmifziie iiireferreii urrnmgm meni of ilioieariogfs euch hi; the driven member i3 and the roar carrier men'aber eupporefi independenfiy of each other,

"moth before and after grinder-shaft, is :is-f The con`v Semioei into Working position. Crete f fog 29, may be employed for locating the' emi 'iortion of a, drafbeondi i; as 30, leading; to emoke stack or chimney,

or to suction-Hoe, 'noi' shown) whereby n' euiabie air eireixiiion may be secured from iie Suction' or wir of Athe chimney flue. The perfino 30 of sueh draft pipo is indicated in the rirawing mi being an elbow of usual form, and fiie is shown Carrying' the fixed tube -J Whieh Connects through the realm-*ard traboinr bearing of *fue carrier C and through rho interior Spaces 5 of ihe enlarged portion of sei-d eeirier, with he interior of he gri-nder By eoi'nymring the eonsruetioii of the rearwfrii carrier C as shown inlongitmiinni section in Y. and 9, and in erosection in ig. 8, ir will be e'vifient how i.. eoneent-riczfdiyloofited o t 5n upiei in the inter" n' of he eer rief iy radial perdons iii, 'nr-mm@ Wiiirii die .air currents ii'f poss, as; indicated i he orro. Ti i and 9'.

For operaing the L, means may be esimored, preferabiy such as ieder, any ronvenieni commonly used in this art for similar purposes, @ne form of auch an apparatus operaiveiy carried on che driver-member ooxifeiss of the lever L, herein shown formed of tire-two plaies G und 6, suiiiabiy connected together and mounted in journals form( the usual rz'ltciiet-wiieel A euiiabie g'mwl, as '7, shown (Fig.) 2) for engaging in the {ec-iii of iio ratohez-WiieeL which is shown carried by the .squared emi oortion 9 of the forward driving member B of the grinder :iprmreua Forward of the wicket-Wheel f1 collar is Shown removably-.iiXed ou Said squared portion 9, and this pars {to be made of any :siiiiiabie length) is shown exieidisig outwmdiy :it 1C for receiving A 'Wrench whereby the atie delai; may operaie ihe grinder shaft S 'by handpower whenever this bemmes deeirebie, The iever L, of course, wii be given the uszm oscillatory moveirien, preferably by a reciprocating rod (not. shown) Connecting with the lever pin in n, 'Weiifkno'wn marinier;

At its forward end the ehnier grinder S, as shown :it the ie hand in Fig. l, :ir-v ranged to connect with and be driven fronthe forward carrier or drivermember B. For ibis purpose the. rearward end of szniii carrier .-Whieh is1 the driving member oi the :1pparams,-is shown provided Witi transverse engaging driving feces at 4 for looking with corresponding engaging driv ing-faces, preferably the sido faces of :i prowhereby die 'filming of the tuiulnririrerf member B operzies Lo rotate or drive iin: forward grinder member D, ne if 'Kiwee hm parte were one connected ubusur sbo fr.. riiiese two parte B and i) are shown eugugy ing together above the aforeeeid bearing' o1, while fire rearward end of 'ii/:e momirer i) reste. on the sirrlar bearing X12, ii a nihil manner. the grinder meo'ibers D and D emineet together, pl'efembiy over the bem-ing 7), by die projection on one o' them tiing into rho `rees-,ee 4b of the other., time forming e driving irieriofff of: engngmuenz. u an aim'h'igous manner, in h' preferred form of my impr-overnam, 'Life roi'nfivo oree from the driver irzineniited through :iii tiiofgrinder members io tixe rear mi rier C. The oregoing ririringengage ais, are shown so errmige that the oeing faces ai; 4, zi-a, and n si?, 1i", are eil parmi iol., or in one direeioii, zo that by turning ,Se faces Stand verieniiy, ihe grinfler member l Je lfed om?, of

' plume, wiiiout requiring the driver to first dreun omvard.; hm oi" course my rod or bar Within the griizdei-simft, must Eisiioe removed, This arrangement. of Seid (irivnf time provides for "dieaseembiing ehe mechanism in i 'nmmer not otherwise avaiiabie. To perform this Work the 'workmen wiii usuaiy enter the furnace chamber fzs .illustrated in 1, mido,

' and will thus (this being usually of ample size therefor) and by means of hooks or chainslift up and remove the re uired member or members D, e able to make repairs to the best advantage.

In some instances it is desirable to disengage the driver B by sliding it forward a limited amount in its bearings. For this purpose I provide a shiftable driver-retainer devlce, which in this instance is indicated as being .of the form of a clamp-collar, as 14, (Fig 1.), which I prefer to make in two parts held in place in a Well-known manner by clamp-bolts at 14, 14a; in the drawing, however, only one such collar-member or part it shown. By loosening and shifting the retainercollar 14, sliding it back against the similarly constructed and removable retaining-collarl, the driver-member B being thus released, may then be slid longitudinally sufiiciently far forward to disengage from the member D. If, now, the collar` l5 be removed, the driver B may then be slid forward and removed from the grinder mechanism, independently of the grinder- Shaft proper. The collar 15 is made tovfit in a groove, at 15, turned in the driver B, and thus furnish a positive stop against the driver sliding too far outwardly.

In the present instance I have shown the forward grinder member'D made of a considerable length so as to be directly supported at the forward end thereof by the forward bearing b1 and at the rearward end thereofl by the second bearing b2. In some cases this manner of building up the entire length of the grinder shaft4 S will be found desirable, and it will, therefore, be understood that in practice the grinder may be con structed wholly of the relatively long members, as D, or that it may in some cases be made up of shorter members, as for instance, such members as D1 and D2, which form a pair extending from said second bearing b2 to the third bearing If. The rearward end of the grinder member D2 is shown engagxig with a cylindrical tubular bearing piece Q through interlocking shoulders at 12. Similarly, the forward members Dl of said pair is shown having a driving engagement with the rearward member, l)`, through the interlocking shoulders at 12% From the bearing Ii to the rear carrier member C, the grinder S is shown built up of short grinder members as D3, and of the preferred form more fully illustrated in 14igsu G and 7. Owing to the very short the driving connection being formed length of this style of the-grinder members they are properly designate as rollars while the longer ones may be designated as tubular members. The collarform grinder members D3 are shown provided with radially-disposed faces. f, f, whereby they interlock with the driving engagement already mentioned. Each collar, or grinder-menr ber D3, is preferably provided with a plurality of teeth, as t, t, (Figs. Gand?) ol a suitable form; these grinder-teeth are shown so located,v two on each collar, that the col'- lars assemble interchangeably in any order, with the teeth t always in a spiral relation on the shaft S, as in Fig. 1. This spiral arrangement is, or may be, the same as shown on that `longer grinder-member D, as clearly indicated in Figs. 1 and 4.

Another feature of my present improvements relates to the guide-bar for alining the grinder-members w ith each other and with the driver-member and the rear carrier-member, thus acting after the manner of a dowel, or doweling-rod, in connection with tensioningr or clamping devices supplemental thereto. In practice, almost any sectional form `of doweling-rod may be used, especially when the function of this rod is mainly as a guide or assembling-bar. to revent any of the members-as D, D', lg'-DL-from heilig shifted out of line through the jamming which sometimes occurs bythe melting down of the slag, or in connection with the manner in which the. power is applied for operating the grinder. One suitable form of thisl guide or rod is illustrated in Figs. 5 and 9, it being there shown as a three-winged bar ll.; this bar should bc lmall enough to slide freely through and revolve in the several grinder members, including the forward member B, and to enter the rearward inember C. The rod lt being wing-shaped, its use provides spaces or channels, as n, Fig. 5, in which the air may flow directly against the inner surfaces of the tubulargrinder members, whereby to keep these ffrom becoming too greatly heated. 'hen the rotatable ail-passage .rod R is drawn out, any of the grinder members, such as I), may be lifted out, the grinder being first turned to bringthe driving-lugs or fares, as, 4, into a vertical position, als already mentioned. lint. when it is necessary to first remove the collanform, D, of grindcr-member, the guidebar should be removed and also, il nood be, the driver li slid forward, which may be dono in the manner before explained. For enabling'the winged-bar It to also serve as a tensioning rod, for clamping together the assembled grinder-members into driving engagement with each other, the rearward end cf the rod l( is shown in Fig. t) formed with the threaded end 31 which screws into the nut while the forward end at 3kl of said rod is threaded to engage with the nut ll which draws against the driver-mcm ber l5. as illustrated at 'he left-hand in Fig. S). Thus the screw-threaded devices in connertion with the described enacting parts, operate for clamping the grinder-members together and also to draw the driver-member and the rear-carrier toward each other and permit the insertio bers, thesebeing us the rear oarrier (l, 'whii wings z' (Fill/,Q l) are shown located on tl and airpassages suoli ras indicated in lg 3,5 srreW-jack, or'

'4g omitted while retaining the lube Whiehis tbussimil whole. lnsteadqof so; forward end of the tube into drivingengagement with the.. forward and rearward,grtnderjrneiubers respectively.

The nut 'may haven.guard-Cap, as BQ, with air-inlets, 32H1 IThe openings 32a also which may be run -intolthe air-channels for dislo'rigging obstructions formed from time to tine by the gradual accumulation of fine Cin/der working iirbletween the ,grinder meinually Inadelof unfinished iron Castings;l One or more dotant screws, :is 33, may be used for detaining the nut .l

from'lbeing' jarred loose during the operar tion of the nletlmnisin;`r

1,5 W'hen not desired to an'akeith'e guidev l bar and tensioningvrlul in a single piece, a plain tube, as T, Fig. l guide or dowelint,r har.

and a separate bolt, 35, may be se ''u'erl into the nut ol e a nut, lll, (similar "to nut ll) is screwed onto the forward ond, as indicated at the letlfhand invFig/. As a means for enabling the operator to enter the pointoty the bolt 3T into said nut 5", iis bolt tor guiding or centering' the saine in the tube T, While permitting lie air ourrents to freely iow through the tubes.- The nut H1 is shown provided with the guard 32 9 and l0. The tube is also shown internally threaded at 36,1 in its fi'vrward end, so theta screw may be inserted for drawingY out the tube by means of a powerful other suitable tool (not shown) should the tube become stuck in the grindenmembers by the overheating' oi"- these parts, as 'willsometimes of'vur.

ln some instances, the bolt may be rl; in such eases the tube l may extend outwardly from he forward 'end l() of the driver B, as irdi- Cated in Fig. l2, 'andmay liar on external thread 3G engaging directly into the nut Hg, er to the nut Il in. all material respects. ln. this arrangement of the tubo, the rearward end may be redured and formed into srrew, as 3l, Fig. le, while several air pa as 113, are formed here described, the tube. ",l may be' substituted for the rod R, in Fig. 9, without other change, and without otherwise af-y fecting the organization of the grinder as a in Fig. lll, the carrier C may be internally i threaderias at. 59,. Fig. 13, and the tube T may be threaded to soreW directly into the .carrier, as there shown; in this ease, the should loe/arranged 'las in Fig. l2, with the result or" making this tube constitute a guide'bar and also a terr sioning member, but in all these cases avoiding the guide-bar from becoming a drivingshaft for the grinder-members, which n ,olfE a snialvlsteel rod` may be used as the reducing the tube T as i l l riv- the,y giiide-barinay be used in connection 'with the central bolt 35; or the forward end may be tln'eaded as in Fig. 12, while the rearward end is formed as in Fig. let.:

Haring thus described my invention, I olaim :Aw I

`l. In a. elinkergrinder 'for furnaces, the combination with a tubular rotatable drivermember having a driving,r face. on the inner end thereof, of actuatingy means for rotatingr` the driver-member, plurality of hollow and longitudinally .separable grinder-l ineinbers having' one through another a driving engagement. With the driver-1nembe r, and a nml-driving guide bar vextendinfi; through the grinder members for 'holding these members in working alineinent, and haring a passage for a current of air, substantially as described. 2 ln 'a elinliergrindvr for furnaces, the combination with a tubular rotatable drivel'- meinber haring a drivingfaceon `the inner end thereof, olt actuating' means `for rotating the drirei-1neinber, a pliuralityv of'vhollow and longitudinally separable ,arrinderfniemf.. bers haring' one through another a. driving'. engagement with the driver-member, and a,

cation of the guide-bar i i guide bar arranged for 'einoval independ-loo vontlv elr the and extenkliiw: tlirorggjh the grinder members for lzolding'x rse nunibers in working: alineuient, and having air, substantially as described. ln aclimber-grinder for furnaces, the4 Combination with .flftubular rotatable drivers,Y member baringra driving face on the inner end then ot' actuating means for rotating the ilriver-nieinher,a plurality of hollow and longitinlinally seria/trahie griruler-xnein'lwrstl haring' bran interlocking engagement .one through another a driving` onffagement with the drirer-member, a Iguide 'oar re1novably. supported within and the grinder members for holding thc-.se mel n.l bers in Working alinement, and haviirtty zrpassage for a current of air.l and aI screW- threaded tensioning/device for clamping the, grinder-members, y 4. ln a choker-grinder for furnaces, the combination. with a tubular rotatable drivermember having a driving; face on the'y inner end thereof, of actuating means for rotating? the drirermeinbor, and longitudinally separable interlockingP grinderqnffzrnbers baring one through an-v other a driving' engagement with the drlverl removal of the driver-.member A a passage fo" a current of ending.through the grinder 13e a plurality of hollmvim( extending: through, A1*15 i members for holding these A`members in working allnement, and having a longitudinal passage for a current of air, and tensioning means in operative connection with said guide bar for clamping together the grindermemblers by the aid of the guide-bar as a tension-member, substantially as described. :3.ln a clinker-grinder for furnaces, the combination with a, tubular rotatable dri vermember having a driving .face on the inner end thereof, of actuating means for rotating the driver-member, a plurality of hollowY and longitudinally separable inter-engaging' grinder-members having one through another a driving engagement with the drivermember, a non-driving guide bar extending through the grinder members for holding these members in working alinement, and having a longitudinal passage .for a current ofnir, and .screw-threaded members engaging threaded endsbfthe guide-bar whereby to clamp and release the grinder-members, substantially as described.

G. In a clinker-grinder for furnaces, the

'combination with the tubular driver-member combination with the tubular driver-mem-v ber having actuating means operatively carried thereon and having a driving-face on the inner end thereof, of a composite tubular grinder-shaft having its forward member provided with driving-faces engageable with said faces of the drivcr-men'lber, av guidebar having a'longitudinal air passage and located within the grinder-shaft and removable independently of the driver-member, a shiftable driver-retainer for releasing the driver-member and so permitting the withdrawal of this member longitudinally out of engagement with the forward member of the grinder-shaft, and a removable retainer-collar for permitting the completel withdrawal of the driver-member out of the grinder mechanism independently of the grinder-shaft.

8. In a clinker-grinder for furnaces, the

,combination with the tubular driver-mem ber having actuating means operatively carried thereon and having transverse drivingfaces on the inner end thereof, of a composite tubularfgrinder-shaft having its for- 'guide-bar for clamping the ward member rovded with drivin -faces engageable witi said faces of the rivermember, a guide-barhaving a longitudinal air passage' add located! within the grindershaft 'and emovable independently of the driver-mem er, clamping means arranged in connection with the ,driver-member and into driving engagement wit each other and clamping one of these into engagement with the driver-member, a shiftable driver-retainer for releasing the driver-member and so permitting the withdrawal ofthis member longitudinally out of engagement with the forward member of the grinder-shaft, and a retainer-device on the driver-member and removable for permitting the complete withdrawal of the driver-member out of the grinder mechanism 9. In a clinker-grinder for furnaces, the .combination with the tubular driver-member having actuating means operatively car-- ried thereon and having a' driving-face on the inner end thereof, of a composite tubular grinder-shaft having its fiorward member engageable with said face of the driverinder-members member, a guide-bar located withnthe grinder-shaft and rotatable therein, and removable independently of the driver-member, screw-threaded devices comprising a nut at the forward end of the driver-member, and arranged in connection with the driver-member and guide bar forclamping the grinder-members into driving" engage ment withy each i other and clamping' -one of these into engagement with the driver-member, and a shiftable driver-retainer for'jreleasing .the driver-member and so permitting the withdrawal of this member longitudinally but of engagement with the forward ,member of the grinder-shaft. for furnaces, thel "310. "In a clinker-grinder combination with theV tubular driver-member. havj i "actuating mea operatively carred .the on and having transverse drivingfaces dni-the inner end thereoofa com-` posite tubular grinder-shaft having its forward member provided with driving-faces.

enga eable with said faces of the drivermem er, a guide-barhaving a longitudinal air passage and located within the grindershaft and rotatable therein, and removable independently of the driver-member, screwthreaded devices substantiallyI such asldescribed arranged for clamping the grindermembers. into driving engagement' `vith each other and clamping one of these into engagement with the driver-member, s, shiftable-'driver-retainer for releasing the drivermember and s0 permitting the withdrawal of this member longitudinally out of engagement with the forwardd member of the grinder-shaft, an'd a, removable retainer-eollar for permitting the complete withdrawal of the driver-member outl of the grinder mechanism independently of the grinder- Shaft.

'1L Tn e. @linker-'grinder for urnnces., e.

composite tubular grinder-shaft comprising e Series of grinder-members shaped und arranged for interlocking driver-engagement with erich other, in combination with a rota-- table tubular driving-member at 'the forward end in drivingengngement with a grinder-member and :i rotateble ,tubular carrier-member :irthe rear enel of said shaft, an airpaseage guifebar rotatively and re; movubly located 'Within the grinder eheft1 for aiining the griren-rnernbers, clamping suppieinen'ei t0 said guidebar and arranged for drawing the driver-member nndeerrier merniiler'one teward the other and thereby clamping egetherftne grinder menbers, bearings and n'coverplate at the forward end .for the ldriver-inernber ande bearing and' covenpiate ai the rearward end for the carrier--niernber whereby these inem- 'ere snpporcer incpendentiy of each einer beth before and after 'the grinder Shaft, i5 :resembled in 'working position, and. drafteendnit rearward ei? and in connec-r tion with the intere-ref the cerrienmember. 12. In eiinkeigrinder :for furnaces, .a composite tnbuiar grinder Shaft comprising n series of eolierwferin grindernrienibers shaped and arranged for 'interlocking driving-engagement with each other, in combination with a rotatable tnbuier driver-member at the forward end in drfiving-engagey rnen with zt' grinder-member and a rotatabe lun rr crrler-memuer the. rear eriof snigiensuit?1 an :reir-:passage ripide-bar rohr-4 tirely, end removably iomted Wit-hin the. grineler` shaft for Mining tige grinder-memeers',l and demping, menne:supplemental te 'seid genie-ber and eomgirising a coneentriealay ioceed nubile the interior of feeid enriemnernele. I :in-f7.A arranged for drawing;` the drivernneinber and carrier-member one towa'rfrriahe other and thereby clamping toether th'egrinder members, and e draftcondiiit rearward of and in connection with the in terier of the carrier-member.

Iain' e clinker-grnder for,;f11rneees,Y a. composite tubular grinderfshaft. comprising 'n seriee of the kdeswri'ned Grinder-members .shaped and arranged for interlocking drivl ing-engagement; with ,each Aother thronghout the length ofsaid shaft, in combination with n. rornzabie tnbner drivenmernber4 et, the "forwerdend end arotetnble tubular arriermember ,ai thefrear end ,of said shaft, a v- Winged air-passage nonriving guide-ber removably located Within the grinder Shaft for :dining the grimier-mernbersj and clamp ing means supplemental to Seid gudebnr 'for drawing the (iriver-member and carrier- 'a draft-conduit in connection with the terior of the carriermemberv i 14. In e clinker-grinder for furnaces, zr composite tubunr grindenshe; comprising; e Iseriee of grinder-members having inrere Licking rivingengugement with nach other, in cgmbinnt-ion with a roetaoe tubuinr driver-member at the forward end and e rotatable tubular carrier-member aty the rear enti of said shaft, an air-passage noirdriving guide-ber Within the grinder shaft for alining the grindenmewhere, and demping means supplemental to and comprising the seid guide-bur end arranged for drawing the driver-member und carrier-'member one reward the other and thereby eizugnping fogether the grinder-miami)are, hearings for rhe driVenmember and fer the eufrrierniem ber whereby these members are supported independentiyof each other, n drni'f'r-Conduit in connection with the interior of ,ehe cere rim-member, and :rreniner device in opel1- eifive connection with the .firis-er-meinber.

sind shifnble for releasing this driver 'from th e grin der-shaft.

l5. In 4:i eiinkergzrinder for furnaces: u umiar grindensnnt coniprieing n series of the described collar-form grinder-members arranged for interlocking driving-engagemerlij with each einer., in combination with a rotamoie tubular drivlngmernber ret the forwerden and, a rot-liable tubular carrier vmember :iii the ear end of -szlid shaft, n

grinder Shaft, for-e'riningf'the grindenmernbere,nnd elanpinginean suppienrentni to .and-4 eemprlemg l'the seid gu1de-barnnd :r

eencenrc'aiy located nut in the interior of raide cerrienmember7 and arranged for drawing the driverlmcinber and carriermcmberlcne toward the other and thereby damping together the grinder-members.

v GROSC C. WGOLSN. VVitne'eseS:

guide-bnr renrovebi ioeaied nidi-inI the' 

